How to exchange DateTime between JPA with Spring and Retrofit on Android?

Question

How should I exchange DateTime objects between Spring and Retrofit?

At this moment I have timestamp in MySQL, Instant in JPA entities (because JPA Buddy uses Instant by default) and Spring produces YYYY-MM-DDTHH:mm:ss.sssZ string in JSON, but it looks like Retrofit is not able to deserialize it into Instant.

This is example of my Spring response:

[
    {
        "id": 1,
        "code": "Abc",
        "name": "Wiha PH3",
        "description": null,
        "created": "2022-10-10T12:00:00Z",
        "modified": "2022-10-10T12:00:00Z",
    }
]

At this moment I had to change my Retrofit DTO datetime fields from Instant to String because it was throwing exceptions about getting string instead of objects.

@Keep
data class InventoryItemDto(
    var id: Int,
    var code: String,
    var name: String,
    var description: String,
    var created: String,         // this is datetime!
    var modified: String         // this is datetime!
)

I have seen similar question here: https://stackoverflow.com/a/34983454/1215291

but in this new project I can change data types in each layer, so maybe there is no need to mess around with deserializers or changing date time format in Spring?

How to exchange DateTime between JPA with Spring and Retrofit on Android?

0 Answers0